Dust-chamber for furnaces.



PATENTBD JULYZZB, 1903. I. GAZIN & LJJ. W. JONES. DUST CHAMBER FORFURNACES.

APPLICATION FILED APR. 22, 1903.

K0 MODEL.

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UNITED STATEs PatentedJuly 28, 1903.

FFICE.

FRANZ CAZIN, OF DENVERQGOLORADO, AND LLEWELLYN J. W. JONES, OF

TACOMA, WASHINGTON.

DUST-CHAMBER- FOR FURNACES.

SPECIFICATION forming part of Letters Patent No. 734,818, dated July 28,1903.

Application filed April 22, 1903. Serial No. 153,880. (No model.)

and LLEWELLYN J. W. 'JoNEs,-former1y a citizen of Great Britain, (buthaving duly declared my intention of becoming a citizen of the UnitedStates,) now residing at Tacoma,

in the State of Washington, have invented certain new and usefulImprovementsin Dust-Chambers, of which the following is a specification.

Our invention relates to that class of dustchambers used inoonnectionwith metallurgical and other furnaces or in connection with theventilating-fanswhich suck air and dust. from dry-crushing machines anddeliver the] same to spacious dust-chambers where the In both cases theobject dust is deposited. isto make the dust-chambers of such size orshape that the gases or air escaping therefrom carry away little or nodust. If the collected dust is valuable, it may be saved; but

in any event it will be prevented from e'ntering the. atmosphere.Dust-chambersfor lead and copper furnaces are commonly constructed ofgreat length, some one thousand feet long, in order that in traversingsuch a distance all of the dust particles will fall by gravity at somepoint within the chamber and there remain; butnotwithstanding the greatlength of chambers employed much of the finer dust goes outwith thedraft or current.

The object of our invention is to provide a dust-chamber of less lengththan those commonly employed,while having the same crossarea andefficiency by reason of its subdivision into a series of low widepassages by partitionsextending in the line of the draft or current.This object we accomplish by the com stru'ction shown in theaccompanyingdrawings, in which- Figure 1 is a transverse vertical section of oneform of our improved dust-chamber. Fig. 2 is a central verticallongitudinal section thereof. Figs. 3 and 4, 5 and 6, and 7 and 8 aresimilar sections of three other forms thereof. Figs. 9, 9 are detailviews of a portion of one of the partitions having grooves or riffles.

In Figs. 1 and 2, A designates the dustchamber, provided at one end withan inlet ct for .the dust-laden gas or air and having an outlet 1) atits opposite end. This chamher A, while havingthe necessary cross-area,is divided into a number of open-ended passages by means of suitablepartitions which extend in the direction of the length of the chamber,but do not extend fully to either of its ends, and therefore while thelength of the chamber has been materially short- 6o ened its arearemains the same and the collection of dust is greatly facilitated.

In Figs. 1 and 2 there are fourhorizontal partitions a, and so there arefive passages formed,which renders the length of the chamher onlyone-fifth the length of the present long not] -subdivided chamberscommonly used. The dust will be removed from the partitionsthroughsuitable doors.- The same result can be obtained by placing the parti-7o tions at an incline, as shown in Figs. 3 and 4, where thedust-chamber A is rectangular in cross-section, but is set with itssides at an angle, and the partitions ct extendat an incline from oneupper side toward the opposite lower inclined side, so that theparticles of dust will slide down into thespace o, from which it maybewithdrawn by means of gates or valves (1 or by any suitable form ofconveyer, as may be desired.

In Figs. 5 and 6 the partitions a incline from the vertical side wallsof the chamber A inwardly and downwardly toward the middle of thechamber, and so the particles of dust will slide down the partitions tothe V- shape bottom of the chamber, from which it may be withdrawnthrough suitable outlets d. i

In Figs. 7 and 8 the dust-chambers A are shown in connected series, onechamber in- 0 clining upwardlyfrom front to rear to an outlet b, whichopens downwardly into the upper side of the lower forward end of thenext chamber in advance, and so on as far as may be desired. In Figs. 7and 8 the partitions a extend J parallel with the top and bottom of thechambers and from side to side thereof. The dust will slide down thesepartitions into spaces at the front ends of the chambers, from which itmay be removed through the outlets d (1 In all of these several forms ofdust-chamthe draft or current, so as not to impede it,

and are therefore not to be likened in their action to what are known asbaffles or baffle-plates, which are set across the path of the currentor draft to deflect it backand forth.

In our construction the volume of gases or air is merely divided into anumber of currents of less height than the height of the chamber inorder to more readily deposit the dust by gravity upon the severalpartitions.

In all of the forms of our apparatus there is a space at the inlet endof the dust-chamber for the incoming dust-laden gases or air to pass tothe several spaces formed by the partitions or shelves, while a similarspace is left at the rear ends of the shelves for the passage of thedust-freed gases or air to the outlet b.

With our improved dust-chamber the finest particles of dust issuing fromlead and copper furnaces will be caused to deposit, and this is due towhat is, in elfect, widening the chamber and correspondingly lesseningits height. For instance, where dust would escape from a chamber athousand feet long it will all be caught by widening such chamber, say,tenfold and giving it one-tenth of its height; but as this would in mostcases cost too much and take up too much room we put in the partitions,and so make a series of low wide chambers or passages which accomplishthe same results as the single wide chamber referred to.

The partitions a, are either plain or provided with grooves a orriffles, if desired, to prevent the settled dust from being blown alongwith the current.

What we claim is- 1. A dust-chamber having an inlet and an outlet at itsends for the gas or air, and a series of longitudinal partitionsextending in the direction of the draft or current and subdividing thechamber between its inlet and outlet into a plurality of open-endedpassages of less height than width, the said partitions beingsubstantially inclined to a vertical plane passing longitudinallythrough the chamber.

2. A dust-chamber having an inlet and an outlet at its ends for the gasor air, and a series of longitudinal partitions extending in thedirection of the draft or current and sub.- dividing the chamber betweenits inlet and outlet into a plurality of open-ended passages of lessheight than width; said partitions being inclined to discharge the duston the bottom of the chamber, said partitions being also substantiallyinclined to a vertical plane passing longitudinally through the chamber.

3. A dust-chamber of rectangular crosssection having an inlet and anoutlet at its ends and set with its sides at an incline to form aV-shape bottom, and a series of inclined partitions extending in thedirection of the current or draft and inclined downwardly from one upperside of the chamber toward the oppositeinclined lower side andsubdividing the chamber into a series of passages of less height thanwidth.

In testimony whereof we affix our signatures in presence of witnesses.

FRANZ OAZIN. LLEWELLYN J. W. JONES.

Witnesses for Cazin:

FRANK R. BYRNS, FRANK E. SHEPARD.

Witnesses for Jones:

B. H. BENNETTS, F. W. CLARK.

